Preheat the oven to 200 degrees celsius (400 degrees fahrenheit)
Wash the brussel sprouts and cut off any thick stems. Divide the brussels sprouts in half. For the first portion, cut each in half and then into small wedges. Place the sliced brussels sprouts on a baking tray and drizzle with 1 tsp olive oil. Bake in the oven for 10 minutes until they are tender and beginning to darken in colour.
For the second portion of brussels sprouts, cut them in half and then thinly shave them. Place the shaved brussels sprouts in a salad bowl.
In a food processor or blender combine all of the ingredients for the dressing and blend until smooth. Taste and add more balsamic vinegar, lemon or mustard as required.
Once the roasted brussels sprouts are done baking, add them to the salad bowl. Sprinkle with salt and pepper, drizzle the salad dressing overtop and garnish the pumpkin seeds before serving.